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If engine reverser cowls have been opened for maintenance action the:()

A.Slats must be retracted

B.Flaps must be retracted

C.Slats and flaps must be retracted

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A.Cluster

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C.Indices

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第3题
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第4题
MySQL数据库中创建表并指定MyISAM存储引擎的语句是()。

A.Createtablet_myisam(idint(10)auto_increment,namevarchar(10),ageint(3),primarykey(id))setengine=MyISAM;

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第5题
The body of an animal may well be compared with some machine like a locomotive engine
(机车).Indeed,the animal body is a machine.It is a machine composed of many parts doing some particular kind of work for which a particular kind of structure fits it.

All the parts are dependent on each other and work together for the accomplishment of the total business of the machine.The locomotive must be provided with fuel, such as coal or wood or other combustible(易燃的)substance,the consumption of which provides the force or energy of the machine.The animal body must be provided with fuel, which is called food, which similarly provides the energy of the animal.

Oxygen must be provided for the combustion of the fuel in the locomotive and of the food in the body.The locomotive is composed of special parts,the fire box for the storage and combustion (燃烧)of fuel; the steam pipes for the carriage of steam; the wheels for locomotion (移动); the chimney for throwing off waste.

The animal body is similarly composed of such parts as the stomach for the storage and digestion of food, the organs for the throwing off of waste water, the blood vessels for the carriage of oxygen and food-holding blood, the legs or wings for locomotion.

1.The body of an animal is like a locomotive in that ().

A.it is composed of many parts that work just like different parts of a locomotive

B.it can do some particular kind of work

C.it works like all the machines in the world

D.both the animal and the locomotive need coal or wood as their fuel

2.Every part of the animal body().

A.works independently

B.works dependently on each other

C.looks like the same as that of a machine

D.has the same structure as that of a machine

3.The energy of an animal is provided by().

A.throwing off waste

B.the combustion of fuels such as coal or wood

C.consumption of food

D.the carriage of blood

4.The function of animal s legs is like__of a machine.

A.the wheels

B.chimney

C.steam pipes

D.the firebox

5.The steam pipes of a locomotive work like the()of an animal body.

A.stomach

B.blood vessels

C.legs

D.wings

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第6题
尿液标本()保存最多一周

A.10°C

B.6°C

C.5°C

D.4°C

E.2°C

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第7题
设C为常数,其期望E(C)为()。

A.0

B.C

C.C²

D.不存在

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第8题
表达式相关标签包括()

A.<c:if>

B.<cut>

C.<c:set>

D.<c:catch>

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第9题
干燥谷物种子时,谷物温度不应超过()

A.55ºC

B.45ºC

C.65ºC

D.60ºC

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第10题
空调设计舒适型空气调节室内计算参数冬季温度为()。

A.18-24°C

B.24-28°C

C.12-15°C

D.15-18°C

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第11题
热拌沥青混合料表面温度低于()后方可开放交通。

A.50°C

B.70°C

C.40°C

D.60°C

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